Answer:

Step-by-step explanation:
Explained in picture
Answer:12 secondes
Step-by-step explanation:48 seconds/ 4 people= 12 second
45 percent of 360 is 162.
Answer:
If an equation has no solution, then the solution set is the _<u>empty set</u>_ and
is denoted by _<u>{ } </u><u>or </u><u>∅</u>__.